./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:40:59,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:40:59,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:40:59,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:40:59,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:40:59,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:41:00,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:41:00,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:41:00,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:41:00,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:41:00,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:41:00,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:41:00,011 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:41:00,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:41:00,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:41:00,016 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:41:00,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:41:00,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:41:00,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:41:00,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:41:00,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:41:00,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:41:00,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:41:00,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:41:00,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:41:00,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:41:00,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:41:00,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:41:00,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:41:00,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:41:00,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:41:00,040 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:41:00,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:41:00,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:41:00,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:41:00,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:41:00,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:41:00,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:41:00,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:41:00,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:41:00,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:41:00,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 01:41:00,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:41:00,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:41:00,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:41:00,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:41:00,080 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:41:00,081 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:41:00,081 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:41:00,081 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:41:00,081 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:41:00,082 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:41:00,082 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:41:00,082 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:41:00,083 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:41:00,083 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:41:00,083 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:41:00,084 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:41:00,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:41:00,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:41:00,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:41:00,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:41:00,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:41:00,092 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:41:00,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:41:00,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:41:00,093 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:41:00,093 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:41:00,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:41:00,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:41:00,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:00,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:41:00,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:41:00,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:41:00,095 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:41:00,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:41:00,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:41:00,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:41:00,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:41:00,096 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-13 01:41:00,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:41:00,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:41:00,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:41:00,450 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:41:00,451 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:41:00,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-13 01:41:00,544 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/04dcc8fd0/99cb5ac2e58d48faa4387bf52612e129/FLAGa3385bb9f [2021-11-13 01:41:01,511 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:41:01,514 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-13 01:41:01,578 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/04dcc8fd0/99cb5ac2e58d48faa4387bf52612e129/FLAGa3385bb9f [2021-11-13 01:41:01,995 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/04dcc8fd0/99cb5ac2e58d48faa4387bf52612e129 [2021-11-13 01:41:01,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:41:02,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:41:02,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:02,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:41:02,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:41:02,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:01" (1/1) ... [2021-11-13 01:41:02,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a088176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:02, skipping insertion in model container [2021-11-13 01:41:02,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:01" (1/1) ... [2021-11-13 01:41:02,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:41:02,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:41:02,494 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-13 01:41:02,503 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-13 01:41:02,533 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:41:02,542 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:41:03,562 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,566 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,567 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,571 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,574 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,612 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,615 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,617 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,623 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,625 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,626 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,627 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:03,628 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:04,102 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:41:04,103 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:41:04,105 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:41:04,107 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:41:04,109 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:41:04,110 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:41:04,110 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:41:04,111 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:41:04,112 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:41:04,113 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:41:04,268 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:41:04,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:04,320 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 01:41:04,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ec82df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:04, skipping insertion in model container [2021-11-13 01:41:04,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:04,322 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 01:41:04,324 INFO L158 Benchmark]: Toolchain (without parser) took 2322.68ms. Allocated memory was 75.5MB in the beginning and 94.4MB in the end (delta: 18.9MB). Free memory was 47.6MB in the beginning and 54.6MB in the end (delta: -7.1MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2021-11-13 01:41:04,325 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 75.5MB. Free memory is still 53.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:41:04,327 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2319.79ms. Allocated memory was 75.5MB in the beginning and 94.4MB in the end (delta: 18.9MB). Free memory was 47.6MB in the beginning and 54.6MB in the end (delta: -7.1MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. [2021-11-13 01:41:04,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 75.5MB. Free memory is still 53.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2319.79ms. Allocated memory was 75.5MB in the beginning and 94.4MB in the end (delta: 18.9MB). Free memory was 47.6MB in the beginning and 54.6MB in the end (delta: -7.1MB). Peak memory consumption was 21.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 7037]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:41:07,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:41:07,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:41:07,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:41:07,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:41:07,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:41:07,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:41:07,152 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:41:07,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:41:07,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:41:07,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:41:07,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:41:07,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:41:07,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:41:07,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:41:07,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:41:07,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:41:07,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:41:07,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:41:07,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:41:07,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:41:07,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:41:07,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:41:07,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:41:07,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:41:07,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:41:07,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:41:07,222 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:41:07,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:41:07,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:41:07,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:41:07,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:41:07,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:41:07,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:41:07,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:41:07,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:41:07,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:41:07,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:41:07,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:41:07,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:41:07,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:41:07,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 01:41:07,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:41:07,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:41:07,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:41:07,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:41:07,302 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:41:07,302 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:41:07,302 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:41:07,302 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:41:07,303 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:41:07,303 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:41:07,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:41:07,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:41:07,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:41:07,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:41:07,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:41:07,308 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:41:07,308 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:41:07,308 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:41:07,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:41:07,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:41:07,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:41:07,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:41:07,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:41:07,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:41:07,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:07,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:41:07,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:41:07,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:41:07,311 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:41:07,311 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:07,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:41:07,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:41:07,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:41:07,312 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fab5c58d108ab0116c19af669265df6088034967e28562e9e7d2713e6ada683d [2021-11-13 01:41:07,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:41:07,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:41:07,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:41:07,764 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:41:07,765 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:41:07,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-13 01:41:07,852 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/828f5bab2/163c2bad232845d497a7bacfb307e254/FLAG745d69c8e [2021-11-13 01:41:08,882 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:41:08,886 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i [2021-11-13 01:41:08,936 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/828f5bab2/163c2bad232845d497a7bacfb307e254/FLAG745d69c8e [2021-11-13 01:41:09,371 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/data/828f5bab2/163c2bad232845d497a7bacfb307e254 [2021-11-13 01:41:09,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:41:09,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:41:09,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:09,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:41:09,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:41:09,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:09" (1/1) ... [2021-11-13 01:41:09,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a9b0a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:09, skipping insertion in model container [2021-11-13 01:41:09,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:41:09" (1/1) ... [2021-11-13 01:41:09,405 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:41:09,511 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:41:09,833 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-13 01:41:09,841 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-13 01:41:09,868 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:41:09,875 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:41:10,939 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,941 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,941 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,942 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,944 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,964 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,965 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,967 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,968 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,971 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,972 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,973 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:10,974 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:11,558 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:41:11,562 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:41:11,565 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:41:11,570 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:41:11,572 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:41:11,578 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:41:11,579 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:41:11,580 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:41:11,581 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:41:11,582 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:41:11,772 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:41:11,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:11,835 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 01:41:11,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:41:11,915 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-13 01:41:11,919 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-13 01:41:11,922 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:41:11,923 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:41:11,989 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:11,989 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:11,990 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:11,990 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:11,991 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,001 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,002 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,014 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,015 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,016 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,017 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,018 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,032 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,080 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:41:12,081 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:41:12,082 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:41:12,083 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:41:12,084 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:41:12,085 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:41:12,086 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:41:12,087 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:41:12,087 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:41:12,088 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:41:12,119 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:41:12,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:12,171 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:41:12,203 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4503,4516] [2021-11-13 01:41:12,204 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/sv-benchmarks/c/aws-c-common/aws_linked_list_swap_contents_harness.i[4563,4576] [2021-11-13 01:41:12,220 WARN L612 FunctionHandler]: implicit declaration of function __builtin_uaddl_overflow [2021-11-13 01:41:12,221 WARN L612 FunctionHandler]: implicit declaration of function __builtin_umull_overflow [2021-11-13 01:41:12,295 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,296 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,296 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,297 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,298 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,307 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,308 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,309 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,310 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,311 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,312 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,312 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,313 WARN L1529 CHandler]: Possible shadowing of function index [2021-11-13 01:41:12,357 WARN L612 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-11-13 01:41:12,358 WARN L612 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-11-13 01:41:12,359 WARN L612 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-11-13 01:41:12,360 WARN L612 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-11-13 01:41:12,361 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-11-13 01:41:12,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-11-13 01:41:12,362 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-11-13 01:41:12,363 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-11-13 01:41:12,363 WARN L612 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-11-13 01:41:12,364 WARN L612 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-11-13 01:41:12,397 WARN L612 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-11-13 01:41:12,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:41:12,838 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:41:12,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12 WrapperNode [2021-11-13 01:41:12,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:41:12,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:41:12,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:41:12,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:41:12,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:41:13,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:41:13,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:41:13,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:41:13,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:41:13,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:41:13,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:41:13,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:41:13,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (1/1) ... [2021-11-13 01:41:13,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:41:13,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:41:13,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:41:13,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:41:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_init [2021-11-13 01:41:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_init [2021-11-13 01:41:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 01:41:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:41:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-13 01:41:13,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-13 01:41:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_node_next_is_valid [2021-11-13 01:41:13,544 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_node_next_is_valid [2021-11-13 01:41:13,544 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_linked_list_is_allocated [2021-11-13 01:41:13,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_linked_list_is_allocated [2021-11-13 01:41:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 01:41:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_is_valid [2021-11-13 01:41:13,545 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_is_valid [2021-11-13 01:41:13,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 01:41:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:41:13,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:41:13,546 INFO L130 BoogieDeclarations]: Found specification of procedure aws_linked_list_empty [2021-11-13 01:41:13,546 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_linked_list_empty [2021-11-13 01:41:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 01:41:13,547 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 01:41:13,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:41:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 01:41:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 01:41:13,548 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-11-13 01:41:13,548 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-11-13 01:41:14,941 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:41:14,941 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 01:41:14,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:41:14 BoogieIcfgContainer [2021-11-13 01:41:14,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:41:14,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:41:14,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:41:14,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:41:14,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:41:09" (1/3) ... [2021-11-13 01:41:14,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39528d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:41:14, skipping insertion in model container [2021-11-13 01:41:14,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:41:12" (2/3) ... [2021-11-13 01:41:14,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39528d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:41:14, skipping insertion in model container [2021-11-13 01:41:14,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:41:14" (3/3) ... [2021-11-13 01:41:14,966 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_linked_list_swap_contents_harness.i [2021-11-13 01:41:14,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:41:14,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 01:41:15,032 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:41:15,040 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:41:15,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 01:41:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-13 01:41:15,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 01:41:15,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:15,078 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:15,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:15,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:15,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2022444143, now seen corresponding path program 1 times [2021-11-13 01:41:15,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:15,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579037093] [2021-11-13 01:41:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:15,105 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:15,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:15,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:41:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:15,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 01:41:15,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 01:41:15,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 01:41:16,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:16,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579037093] [2021-11-13 01:41:16,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579037093] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:16,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:16,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-13 01:41:16,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971921793] [2021-11-13 01:41:16,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:16,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 01:41:16,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:16,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 01:41:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:41:16,294 INFO L87 Difference]: Start difference. First operand has 114 states, 70 states have (on average 1.3) internal successors, (91), 73 states have internal predecessors, (91), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Second operand has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:41:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:16,377 INFO L93 Difference]: Finished difference Result 225 states and 346 transitions. [2021-11-13 01:41:16,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 01:41:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 101 [2021-11-13 01:41:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:16,393 INFO L225 Difference]: With dead ends: 225 [2021-11-13 01:41:16,393 INFO L226 Difference]: Without dead ends: 107 [2021-11-13 01:41:16,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 01:41:16,405 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.34ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:16,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 6.34ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 01:41:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-13 01:41:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-11-13 01:41:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.265625) internal successors, (81), 68 states have internal predecessors, (81), 34 states have call successors, (34), 8 states have call predecessors, (34), 8 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-13 01:41:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2021-11-13 01:41:16,502 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 101 [2021-11-13 01:41:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:16,503 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2021-11-13 01:41:16,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.5) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 01:41:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2021-11-13 01:41:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 01:41:16,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:16,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:16,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:16,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:16,743 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash 661877963, now seen corresponding path program 1 times [2021-11-13 01:41:16,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:16,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523618270] [2021-11-13 01:41:16,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:16,746 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:16,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:16,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:41:17,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:17,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:41:17,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-13 01:41:18,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:18,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523618270] [2021-11-13 01:41:18,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523618270] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:18,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:18,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 01:41:18,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402889711] [2021-11-13 01:41:18,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:18,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:41:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:41:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:18,259 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:19,158 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions. [2021-11-13 01:41:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:41:19,161 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 101 [2021-11-13 01:41:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:19,166 INFO L225 Difference]: With dead ends: 211 [2021-11-13 01:41:19,167 INFO L226 Difference]: Without dead ends: 123 [2021-11-13 01:41:19,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:19,171 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 76 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 722.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.30ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 820.22ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:19,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 469 Invalid, 93 Unknown, 0 Unchecked, 8.30ms Time], IncrementalHoareTripleChecker [51 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 820.22ms Time] [2021-11-13 01:41:19,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-13 01:41:19,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-13 01:41:19,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.3205128205128205) internal successors, (103), 83 states have internal predecessors, (103), 35 states have call successors, (35), 8 states have call predecessors, (35), 9 states have return successors, (37), 33 states have call predecessors, (37), 33 states have call successors, (37) [2021-11-13 01:41:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 175 transitions. [2021-11-13 01:41:19,221 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 175 transitions. Word has length 101 [2021-11-13 01:41:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:19,226 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 175 transitions. [2021-11-13 01:41:19,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 175 transitions. [2021-11-13 01:41:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 01:41:19,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:19,232 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:19,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:19,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:19,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash 993722959, now seen corresponding path program 1 times [2021-11-13 01:41:19,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:19,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [239990042] [2021-11-13 01:41:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:19,458 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:19,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:19,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:19,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:41:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:41:19,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 01:41:20,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:20,716 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 01:41:20,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:20,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [239990042] [2021-11-13 01:41:20,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [239990042] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:20,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:20,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-13 01:41:20,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334381189] [2021-11-13 01:41:20,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:20,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:41:20,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:41:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:20,719 INFO L87 Difference]: Start difference. First operand 123 states and 175 transitions. Second operand has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:20,892 INFO L93 Difference]: Finished difference Result 231 states and 340 transitions. [2021-11-13 01:41:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:41:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 101 [2021-11-13 01:41:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:20,898 INFO L225 Difference]: With dead ends: 231 [2021-11-13 01:41:20,898 INFO L226 Difference]: Without dead ends: 127 [2021-11-13 01:41:20,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:20,903 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.67ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:20,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 687 Invalid, 42 Unknown, 0 Unchecked, 6.67ms Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 127.53ms Time] [2021-11-13 01:41:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-13 01:41:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-11-13 01:41:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 85 states have internal predecessors, (104), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-13 01:41:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2021-11-13 01:41:20,929 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 101 [2021-11-13 01:41:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:20,930 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2021-11-13 01:41:20,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:41:20,931 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2021-11-13 01:41:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-13 01:41:20,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:20,933 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:20,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:21,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:21,158 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:21,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:21,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1588307531, now seen corresponding path program 1 times [2021-11-13 01:41:21,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:21,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585706420] [2021-11-13 01:41:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:21,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:21,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:21,166 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:21,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:41:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:21,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:41:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:41:22,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:22,555 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-13 01:41:22,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:22,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585706420] [2021-11-13 01:41:22,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585706420] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:22,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:22,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-13 01:41:22,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395359268] [2021-11-13 01:41:22,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:22,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:22,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:41:22,559 INFO L87 Difference]: Start difference. First operand 125 states and 182 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:23,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:23,932 INFO L93 Difference]: Finished difference Result 239 states and 361 transitions. [2021-11-13 01:41:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2021-11-13 01:41:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:23,937 INFO L225 Difference]: With dead ends: 239 [2021-11-13 01:41:23,937 INFO L226 Difference]: Without dead ends: 133 [2021-11-13 01:41:23,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:41:23,940 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 70 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1167.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.41ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1283.71ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:23,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 641 Invalid, 193 Unknown, 0 Unchecked, 9.41ms Time], IncrementalHoareTripleChecker [46 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1283.71ms Time] [2021-11-13 01:41:23,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-13 01:41:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2021-11-13 01:41:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 85 states have internal predecessors, (104), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-13 01:41:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 182 transitions. [2021-11-13 01:41:23,964 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 182 transitions. Word has length 103 [2021-11-13 01:41:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:23,965 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 182 transitions. [2021-11-13 01:41:23,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 182 transitions. [2021-11-13 01:41:23,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 01:41:23,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:23,968 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:24,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:24,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:24,191 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:24,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1973008072, now seen corresponding path program 1 times [2021-11-13 01:41:24,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:24,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849703450] [2021-11-13 01:41:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:24,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:24,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:24,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:24,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:41:24,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:24,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:41:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 01:41:25,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-13 01:41:25,593 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:25,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849703450] [2021-11-13 01:41:25,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849703450] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:25,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:25,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-13 01:41:25,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494692439] [2021-11-13 01:41:25,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:25,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:41:25,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:41:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:41:25,597 INFO L87 Difference]: Start difference. First operand 125 states and 182 transitions. Second operand has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:27,231 INFO L93 Difference]: Finished difference Result 260 states and 402 transitions. [2021-11-13 01:41:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 105 [2021-11-13 01:41:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:27,235 INFO L225 Difference]: With dead ends: 260 [2021-11-13 01:41:27,235 INFO L226 Difference]: Without dead ends: 154 [2021-11-13 01:41:27,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:41:27,238 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 98 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1341.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.67ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1471.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:27,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 752 Invalid, 275 Unknown, 0 Unchecked, 8.67ms Time], IncrementalHoareTripleChecker [55 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1471.60ms Time] [2021-11-13 01:41:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-13 01:41:27,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 126. [2021-11-13 01:41:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.325) internal successors, (106), 86 states have internal predecessors, (106), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-13 01:41:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2021-11-13 01:41:27,264 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 105 [2021-11-13 01:41:27,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:27,265 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2021-11-13 01:41:27,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.428571428571429) internal successors, (52), 8 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2021-11-13 01:41:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 01:41:27,268 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:27,268 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:27,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:27,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:27,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash -172700770, now seen corresponding path program 1 times [2021-11-13 01:41:27,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:27,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270314685] [2021-11-13 01:41:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:27,488 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:27,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:27,489 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:27,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:41:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:27,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:41:27,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:41:28,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:28,589 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 01:41:28,590 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:28,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270314685] [2021-11-13 01:41:28,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270314685] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:28,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:28,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3] total 8 [2021-11-13 01:41:28,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418259776] [2021-11-13 01:41:28,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:28,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:28,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:28,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:28,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:28,593 INFO L87 Difference]: Start difference. First operand 126 states and 184 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:30,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:30,279 INFO L93 Difference]: Finished difference Result 249 states and 393 transitions. [2021-11-13 01:41:30,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:30,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 106 [2021-11-13 01:41:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:30,284 INFO L225 Difference]: With dead ends: 249 [2021-11-13 01:41:30,284 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 01:41:30,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:41:30,287 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 79 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1466.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1595.18ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:30,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 638 Invalid, 227 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [50 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 1595.18ms Time] [2021-11-13 01:41:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 01:41:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-11-13 01:41:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.3253012048192772) internal successors, (110), 89 states have internal predecessors, (110), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-13 01:41:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 188 transitions. [2021-11-13 01:41:30,311 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 188 transitions. Word has length 106 [2021-11-13 01:41:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:30,312 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 188 transitions. [2021-11-13 01:41:30,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-11-13 01:41:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 188 transitions. [2021-11-13 01:41:30,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 01:41:30,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:30,315 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:30,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:30,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:30,539 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:30,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:30,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1129641728, now seen corresponding path program 1 times [2021-11-13 01:41:30,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:30,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1733752750] [2021-11-13 01:41:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:30,540 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:30,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:30,541 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:30,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:41:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:41:30,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 01:41:31,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 01:41:31,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:31,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1733752750] [2021-11-13 01:41:31,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1733752750] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:31,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:31,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 01:41:31,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270171173] [2021-11-13 01:41:31,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:31,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:31,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:31,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:31,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:31,639 INFO L87 Difference]: Start difference. First operand 129 states and 188 transitions. Second operand has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:41:31,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:31,821 INFO L93 Difference]: Finished difference Result 247 states and 373 transitions. [2021-11-13 01:41:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:41:31,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 114 [2021-11-13 01:41:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:31,826 INFO L225 Difference]: With dead ends: 247 [2021-11-13 01:41:31,826 INFO L226 Difference]: Without dead ends: 137 [2021-11-13 01:41:31,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:41:31,829 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 4 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 109.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.44ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:31,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 859 Invalid, 57 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 132.44ms Time] [2021-11-13 01:41:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-13 01:41:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2021-11-13 01:41:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 90 states have internal predecessors, (111), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-13 01:41:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 189 transitions. [2021-11-13 01:41:31,877 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 189 transitions. Word has length 114 [2021-11-13 01:41:31,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:31,879 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 189 transitions. [2021-11-13 01:41:31,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:41:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 189 transitions. [2021-11-13 01:41:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:41:31,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:31,882 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:31,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:32,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:32,096 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:32,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash -369213267, now seen corresponding path program 1 times [2021-11-13 01:41:32,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:32,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051287573] [2021-11-13 01:41:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:32,098 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:32,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:32,099 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:32,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:41:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:32,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:41:32,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:41:34,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:41:34,899 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:34,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051287573] [2021-11-13 01:41:34,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051287573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:34,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604496091] [2021-11-13 01:41:34,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:34,900 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:34,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:41:34,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:41:34,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-13 01:41:35,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:41:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:41:35,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 01:41:35,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1604496091] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:35,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:35,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 8, 4] total 18 [2021-11-13 01:41:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246737792] [2021-11-13 01:41:35,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:35,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:41:35,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:41:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-11-13 01:41:35,831 INFO L87 Difference]: Start difference. First operand 130 states and 189 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:41:35,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:35,914 INFO L93 Difference]: Finished difference Result 243 states and 362 transitions. [2021-11-13 01:41:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:41:35,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-13 01:41:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:35,920 INFO L225 Difference]: With dead ends: 243 [2021-11-13 01:41:35,920 INFO L226 Difference]: Without dead ends: 135 [2021-11-13 01:41:35,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 444 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:41:35,923 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 21 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.81ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:35,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 431 Invalid, 15 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 34.81ms Time] [2021-11-13 01:41:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-13 01:41:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2021-11-13 01:41:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 90 states have internal predecessors, (110), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-13 01:41:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 188 transitions. [2021-11-13 01:41:35,949 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 188 transitions. Word has length 116 [2021-11-13 01:41:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:35,951 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 188 transitions. [2021-11-13 01:41:35,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:41:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 188 transitions. [2021-11-13 01:41:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:41:35,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:35,954 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:35,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:36,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:36,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:36,362 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:36,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -121066773, now seen corresponding path program 1 times [2021-11-13 01:41:36,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:36,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597116989] [2021-11-13 01:41:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:36,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:36,365 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:36,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:41:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:36,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:41:36,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:41:38,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:41:38,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:38,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597116989] [2021-11-13 01:41:38,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597116989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:38,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [5185129] [2021-11-13 01:41:38,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:38,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:38,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:41:38,996 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:41:38,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-13 01:41:39,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:39,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:41:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 01:41:39,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 01:41:39,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [5185129] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:39,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:39,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 8, 5] total 19 [2021-11-13 01:41:39,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291779847] [2021-11-13 01:41:39,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:39,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:41:39,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:39,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:41:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:41:39,912 INFO L87 Difference]: Start difference. First operand 130 states and 188 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:41:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:40,072 INFO L93 Difference]: Finished difference Result 249 states and 385 transitions. [2021-11-13 01:41:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:41:40,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-13 01:41:40,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:40,075 INFO L225 Difference]: With dead ends: 249 [2021-11-13 01:41:40,075 INFO L226 Difference]: Without dead ends: 138 [2021-11-13 01:41:40,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 445 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-11-13 01:41:40,078 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 24 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.52ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:40,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 569 Invalid, 29 Unknown, 0 Unchecked, 2.52ms Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 45.60ms Time] [2021-11-13 01:41:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-13 01:41:40,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-11-13 01:41:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 92 states have internal predecessors, (111), 35 states have call successors, (35), 8 states have call predecessors, (35), 10 states have return successors, (43), 33 states have call predecessors, (43), 33 states have call successors, (43) [2021-11-13 01:41:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2021-11-13 01:41:40,093 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 116 [2021-11-13 01:41:40,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:40,094 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2021-11-13 01:41:40,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:41:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2021-11-13 01:41:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:41:40,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:40,097 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:40,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:40,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-13 01:41:40,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:40,503 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1492874071, now seen corresponding path program 1 times [2021-11-13 01:41:40,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:40,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608715980] [2021-11-13 01:41:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:40,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:40,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:40,506 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:41:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:40,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:41:40,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:41:42,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:41:42,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:42,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608715980] [2021-11-13 01:41:42,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608715980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:42,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695352868] [2021-11-13 01:41:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:42,940 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:41:42,941 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:41:42,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-13 01:41:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:43,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:41:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:41:43,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:43,854 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 01:41:43,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [695352868] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:43,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:43,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 8, 6] total 20 [2021-11-13 01:41:43,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20091398] [2021-11-13 01:41:43,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:43,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:41:43,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:41:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-13 01:41:43,857 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:41:44,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:44,089 INFO L93 Difference]: Finished difference Result 245 states and 373 transitions. [2021-11-13 01:41:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 01:41:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-13 01:41:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:44,094 INFO L225 Difference]: With dead ends: 245 [2021-11-13 01:41:44,094 INFO L226 Difference]: Without dead ends: 132 [2021-11-13 01:41:44,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:41:44,098 INFO L933 BasicCegarLoop]: 140 mSDtfsCounter, 19 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.60ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:44,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 699 Invalid, 45 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 66.60ms Time] [2021-11-13 01:41:44,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-13 01:41:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-11-13 01:41:44,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 83 states have (on average 1.216867469879518) internal successors, (101), 89 states have internal predecessors, (101), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-13 01:41:44,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 177 transitions. [2021-11-13 01:41:44,111 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 177 transitions. Word has length 116 [2021-11-13 01:41:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:44,112 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 177 transitions. [2021-11-13 01:41:44,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 01:41:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 177 transitions. [2021-11-13 01:41:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 01:41:44,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:44,115 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:44,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:44,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:44,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:44,530 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:44,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:44,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1772733927, now seen corresponding path program 1 times [2021-11-13 01:41:44,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:44,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853261127] [2021-11-13 01:41:44,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:44,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:44,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:44,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:44,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:41:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 01:41:44,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 01:41:46,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:41:46,598 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:46,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853261127] [2021-11-13 01:41:46,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853261127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:41:46,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037779048] [2021-11-13 01:41:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:46,599 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:41:46,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:41:46,604 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:41:46,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-13 01:41:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:46,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:47,277 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 01:41:47,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 01:41:47,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037779048] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:47,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:41:47,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-13 01:41:47,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354610026] [2021-11-13 01:41:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:47,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:41:47,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:47,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:41:47,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:41:47,650 INFO L87 Difference]: Start difference. First operand 128 states and 177 transitions. Second operand has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:47,918 INFO L93 Difference]: Finished difference Result 248 states and 359 transitions. [2021-11-13 01:41:47,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:41:47,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 116 [2021-11-13 01:41:47,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:47,924 INFO L225 Difference]: With dead ends: 248 [2021-11-13 01:41:47,924 INFO L226 Difference]: Without dead ends: 139 [2021-11-13 01:41:47,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:41:47,927 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 8 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 116.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.64ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.19ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:47,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 1023 Invalid, 77 Unknown, 0 Unchecked, 4.64ms Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 133.19ms Time] [2021-11-13 01:41:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-13 01:41:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-11-13 01:41:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 90 states have internal predecessors, (102), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (42), 32 states have call predecessors, (42), 32 states have call successors, (42) [2021-11-13 01:41:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 178 transitions. [2021-11-13 01:41:47,940 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 178 transitions. Word has length 116 [2021-11-13 01:41:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:47,941 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 178 transitions. [2021-11-13 01:41:47,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 4 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 178 transitions. [2021-11-13 01:41:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:41:47,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:47,944 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:47,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:48,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 01:41:48,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:48,347 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash 147277827, now seen corresponding path program 1 times [2021-11-13 01:41:48,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:48,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607984306] [2021-11-13 01:41:48,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:48,348 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:48,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:48,350 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:48,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 01:41:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:48,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:41:48,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:41:49,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:41:49,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:49,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607984306] [2021-11-13 01:41:49,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607984306] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:49,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:49,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2021-11-13 01:41:49,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344085856] [2021-11-13 01:41:49,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:49,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:41:49,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:41:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:41:49,353 INFO L87 Difference]: Start difference. First operand 129 states and 178 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:50,179 INFO L93 Difference]: Finished difference Result 238 states and 331 transitions. [2021-11-13 01:41:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:41:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 117 [2021-11-13 01:41:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:50,182 INFO L225 Difference]: With dead ends: 238 [2021-11-13 01:41:50,183 INFO L226 Difference]: Without dead ends: 131 [2021-11-13 01:41:50,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:50,185 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 47 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 749.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 793.59ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:50,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 470 Invalid, 74 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [42 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 793.59ms Time] [2021-11-13 01:41:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-13 01:41:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-13 01:41:50,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 92 states have internal predecessors, (103), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (43), 32 states have call predecessors, (43), 32 states have call successors, (43) [2021-11-13 01:41:50,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2021-11-13 01:41:50,198 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 117 [2021-11-13 01:41:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:50,198 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2021-11-13 01:41:50,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2021-11-13 01:41:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-13 01:41:50,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:50,201 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:50,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:50,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:50,414 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:50,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash 54718475, now seen corresponding path program 1 times [2021-11-13 01:41:50,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:50,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [864297748] [2021-11-13 01:41:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:50,416 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:50,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:50,421 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:50,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 01:41:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:50,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 01:41:50,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 01:41:50,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:51,243 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 01:41:51,243 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:51,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [864297748] [2021-11-13 01:41:51,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [864297748] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:51,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:51,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2021-11-13 01:41:51,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145465757] [2021-11-13 01:41:51,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:51,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:41:51,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:51,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:41:51,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:41:51,245 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:41:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:51,383 INFO L93 Difference]: Finished difference Result 242 states and 337 transitions. [2021-11-13 01:41:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:41:51,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 117 [2021-11-13 01:41:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:51,388 INFO L225 Difference]: With dead ends: 242 [2021-11-13 01:41:51,389 INFO L226 Difference]: Without dead ends: 133 [2021-11-13 01:41:51,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:51,393 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.28ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.32ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:51,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 687 Invalid, 42 Unknown, 0 Unchecked, 2.28ms Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 115.32ms Time] [2021-11-13 01:41:51,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-13 01:41:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-11-13 01:41:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 94 states have internal predecessors, (104), 34 states have call successors, (34), 8 states have call predecessors, (34), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-13 01:41:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2021-11-13 01:41:51,440 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 117 [2021-11-13 01:41:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:51,440 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2021-11-13 01:41:51,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:41:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2021-11-13 01:41:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:41:51,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:51,444 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:51,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-13 01:41:51,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:51,662 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:51,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1150330055, now seen corresponding path program 1 times [2021-11-13 01:41:51,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:51,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212940804] [2021-11-13 01:41:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:51,664 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:51,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:51,665 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:51,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 01:41:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:52,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:41:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:41:52,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:41:52,895 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:52,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212940804] [2021-11-13 01:41:52,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212940804] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:52,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:52,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-11-13 01:41:52,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732035783] [2021-11-13 01:41:52,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:52,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:52,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:52,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:41:52,899 INFO L87 Difference]: Start difference. First operand 133 states and 186 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:53,965 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2021-11-13 01:41:53,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 01:41:53,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 119 [2021-11-13 01:41:53,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:53,969 INFO L225 Difference]: With dead ends: 247 [2021-11-13 01:41:53,969 INFO L226 Difference]: Without dead ends: 136 [2021-11-13 01:41:53,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-13 01:41:53,971 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 69 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 907.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.82ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 998.20ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:53,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 649 Invalid, 179 Unknown, 0 Unchecked, 3.82ms Time], IncrementalHoareTripleChecker [44 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 998.20ms Time] [2021-11-13 01:41:53,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-13 01:41:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-11-13 01:41:53,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 87 states have (on average 1.206896551724138) internal successors, (105), 95 states have internal predecessors, (105), 34 states have call successors, (34), 8 states have call predecessors, (34), 12 states have return successors, (48), 32 states have call predecessors, (48), 32 states have call successors, (48) [2021-11-13 01:41:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 187 transitions. [2021-11-13 01:41:53,988 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 187 transitions. Word has length 119 [2021-11-13 01:41:53,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:53,989 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 187 transitions. [2021-11-13 01:41:53,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 187 transitions. [2021-11-13 01:41:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-13 01:41:53,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:53,993 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:54,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:54,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:54,217 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash 787509940, now seen corresponding path program 1 times [2021-11-13 01:41:54,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:54,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517267835] [2021-11-13 01:41:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:54,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:54,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:54,220 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:54,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 01:41:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:41:54,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:41:54,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-13 01:41:55,386 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:55,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517267835] [2021-11-13 01:41:55,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517267835] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:55,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:55,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 11 [2021-11-13 01:41:55,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807026014] [2021-11-13 01:41:55,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:55,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:41:55,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:41:55,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:41:55,388 INFO L87 Difference]: Start difference. First operand 134 states and 187 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:57,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:57,612 INFO L93 Difference]: Finished difference Result 253 states and 358 transitions. [2021-11-13 01:41:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:41:57,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 121 [2021-11-13 01:41:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:57,626 INFO L225 Difference]: With dead ends: 253 [2021-11-13 01:41:57,626 INFO L226 Difference]: Without dead ends: 141 [2021-11-13 01:41:57,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:41:57,629 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 92 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1981.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2117.15ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 763 Invalid, 243 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [53 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 2117.15ms Time] [2021-11-13 01:41:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-13 01:41:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2021-11-13 01:41:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 92 states have internal predecessors, (103), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-13 01:41:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 181 transitions. [2021-11-13 01:41:57,644 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 181 transitions. Word has length 121 [2021-11-13 01:41:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:57,645 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 181 transitions. [2021-11-13 01:41:57,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 8 states have internal predecessors, (74), 4 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 01:41:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 181 transitions. [2021-11-13 01:41:57,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 01:41:57,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:57,648 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:57,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:57,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:57,862 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1331296970, now seen corresponding path program 1 times [2021-11-13 01:41:57,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:57,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [133938054] [2021-11-13 01:41:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:41:57,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:57,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:57,865 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:57,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 01:41:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:41:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:41:58,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:41:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-13 01:41:58,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:41:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-13 01:41:58,871 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:41:58,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [133938054] [2021-11-13 01:41:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [133938054] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:41:58,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:41:58,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 8 [2021-11-13 01:41:58,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315244442] [2021-11-13 01:41:58,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:41:58,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:41:58,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:41:58,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:41:58,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:41:58,873 INFO L87 Difference]: Start difference. First operand 131 states and 181 transitions. Second operand has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:41:59,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:41:59,034 INFO L93 Difference]: Finished difference Result 248 states and 346 transitions. [2021-11-13 01:41:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 01:41:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-11-13 01:41:59,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:41:59,037 INFO L225 Difference]: With dead ends: 248 [2021-11-13 01:41:59,037 INFO L226 Difference]: Without dead ends: 139 [2021-11-13 01:41:59,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:41:59,039 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 4 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 109.29ms IncrementalHoareTripleChecker+Time [2021-11-13 01:41:59,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 853 Invalid, 57 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 109.29ms Time] [2021-11-13 01:41:59,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-13 01:41:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 132. [2021-11-13 01:41:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 93 states have internal predecessors, (104), 34 states have call successors, (34), 8 states have call predecessors, (34), 11 states have return successors, (44), 32 states have call predecessors, (44), 32 states have call successors, (44) [2021-11-13 01:41:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 182 transitions. [2021-11-13 01:41:59,054 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 182 transitions. Word has length 130 [2021-11-13 01:41:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:41:59,055 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 182 transitions. [2021-11-13 01:41:59,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 01:41:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 182 transitions. [2021-11-13 01:41:59,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 01:41:59,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:41:59,058 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:41:59,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 01:41:59,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:41:59,274 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:41:59,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:41:59,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1396943881, now seen corresponding path program 2 times [2021-11-13 01:41:59,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:41:59,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129612058] [2021-11-13 01:41:59,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:41:59,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:41:59,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:41:59,277 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:41:59,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 01:42:01,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:42:01,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:42:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 01:42:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 72 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 01:42:02,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 01:42:03,281 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:03,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129612058] [2021-11-13 01:42:03,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129612058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:03,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1722258440] [2021-11-13 01:42:03,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:42:03,282 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:42:03,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:42:03,283 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:42:03,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 01:42:04,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:42:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:42:04,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 01:42:04,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 01:42:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-13 01:42:05,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1722258440] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:42:05,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:42:05,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10, 8, 8] total 23 [2021-11-13 01:42:05,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218657933] [2021-11-13 01:42:05,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:42:05,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 01:42:05,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 01:42:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-11-13 01:42:05,292 INFO L87 Difference]: Start difference. First operand 132 states and 182 transitions. Second operand has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:42:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:05,563 INFO L93 Difference]: Finished difference Result 249 states and 346 transitions. [2021-11-13 01:42:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:42:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 132 [2021-11-13 01:42:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:05,567 INFO L225 Difference]: With dead ends: 249 [2021-11-13 01:42:05,567 INFO L226 Difference]: Without dead ends: 139 [2021-11-13 01:42:05,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 503 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:42:05,570 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 8 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 118.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.89ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.52ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:05,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 995 Invalid, 77 Unknown, 0 Unchecked, 2.89ms Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 142.52ms Time] [2021-11-13 01:42:05,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-13 01:42:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2021-11-13 01:42:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 90 states have internal predecessors, (102), 34 states have call successors, (34), 8 states have call predecessors, (34), 10 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-11-13 01:42:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2021-11-13 01:42:05,582 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 132 [2021-11-13 01:42:05,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:05,583 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2021-11-13 01:42:05,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 01:42:05,607 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2021-11-13 01:42:05,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-13 01:42:05,609 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:05,610 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:05,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:05,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-13 01:42:06,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 01:42:06,032 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash -659240699, now seen corresponding path program 2 times [2021-11-13 01:42:06,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:06,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307537779] [2021-11-13 01:42:06,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:42:06,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:06,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:06,036 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:06,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 01:42:08,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:42:08,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:42:08,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 01:42:08,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:11,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 01:42:11,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-13 01:42:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 01:42:11,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:15,572 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:15,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 49 [2021-11-13 01:42:15,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:15,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 66 [2021-11-13 01:42:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 01:42:16,290 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:16,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307537779] [2021-11-13 01:42:16,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307537779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:16,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [197037001] [2021-11-13 01:42:16,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:42:16,291 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:42:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:42:16,292 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:42:16,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-13 01:42:17,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:42:17,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:42:17,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 01:42:17,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:19,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 01:42:19,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-13 01:42:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:42:19,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:20,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:20,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2021-11-13 01:42:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 01:42:22,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [197037001] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:22,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891856310] [2021-11-13 01:42:22,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 01:42:22,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:42:22,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:42:22,134 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:42:22,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 01:42:27,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 01:42:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:42:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 01:42:27,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 01:42:29,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-13 01:42:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 46 proven. 33 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 01:42:29,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:30,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:30,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-13 01:42:30,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:30,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2021-11-13 01:42:30,789 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 01:42:30,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891856310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:30,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-13 01:42:30,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12, 9, 12, 9] total 34 [2021-11-13 01:42:30,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094839196] [2021-11-13 01:42:30,790 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-13 01:42:30,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-13 01:42:30,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:42:30,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-13 01:42:30,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:42:30,793 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 34 states, 32 states have (on average 5.3125) internal successors, (170), 34 states have internal predecessors, (170), 17 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (33), 15 states have call predecessors, (33), 17 states have call successors, (33) [2021-11-13 01:42:46,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:42:46,247 INFO L93 Difference]: Finished difference Result 452 states and 748 transitions. [2021-11-13 01:42:46,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 01:42:46,249 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 5.3125) internal successors, (170), 34 states have internal predecessors, (170), 17 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (33), 15 states have call predecessors, (33), 17 states have call successors, (33) Word has length 133 [2021-11-13 01:42:46,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:42:46,254 INFO L225 Difference]: With dead ends: 452 [2021-11-13 01:42:46,254 INFO L226 Difference]: Without dead ends: 337 [2021-11-13 01:42:46,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 753 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=347, Invalid=2103, Unknown=0, NotChecked=0, Total=2450 [2021-11-13 01:42:46,258 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 351 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11691.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.59ms SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 795 IncrementalHoareTripleChecker+Unchecked, 13203.11ms IncrementalHoareTripleChecker+Time [2021-11-13 01:42:46,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 3207 Invalid, 3141 Unknown, 0 Unchecked, 33.59ms Time], IncrementalHoareTripleChecker [402 Valid, 1944 Invalid, 0 Unknown, 795 Unchecked, 13203.11ms Time] [2021-11-13 01:42:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-13 01:42:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 177. [2021-11-13 01:42:46,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 121 states have (on average 1.2231404958677685) internal successors, (148), 128 states have internal predecessors, (148), 41 states have call successors, (41), 11 states have call predecessors, (41), 14 states have return successors, (52), 40 states have call predecessors, (52), 39 states have call successors, (52) [2021-11-13 01:42:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 241 transitions. [2021-11-13 01:42:46,295 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 241 transitions. Word has length 133 [2021-11-13 01:42:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:42:46,296 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 241 transitions. [2021-11-13 01:42:46,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 5.3125) internal successors, (170), 34 states have internal predecessors, (170), 17 states have call successors, (33), 3 states have call predecessors, (33), 7 states have return successors, (33), 15 states have call predecessors, (33), 17 states have call successors, (33) [2021-11-13 01:42:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 241 transitions. [2021-11-13 01:42:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 01:42:46,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:42:46,300 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:42:46,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:46,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 01:42:46,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-13 01:42:46,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:42:46,908 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:42:46,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:42:46,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1992797946, now seen corresponding path program 3 times [2021-11-13 01:42:46,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:42:46,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810642955] [2021-11-13 01:42:46,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:42:46,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:42:46,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:42:46,912 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:42:46,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-13 01:42:49,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 01:42:49,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:42:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 01:42:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 01:42:51,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:42:52,753 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2021-11-13 01:42:52,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 01:42:52,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 38 [2021-11-13 01:42:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 01:42:53,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:42:53,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810642955] [2021-11-13 01:42:53,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810642955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:42:53,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [663832482] [2021-11-13 01:42:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:42:53,293 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 01:42:53,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 01:42:53,294 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 01:42:53,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_396e46ea-9019-402b-a8b4-48cc51a1f599/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-13 01:42:56,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 01:42:56,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:42:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 01:42:56,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:42:56,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-13 01:42:56,502 INFO L354 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2021-11-13 01:42:56,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-13 01:42:56,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:42:56,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-11-13 01:42:59,873 WARN L860 $PredicateComparison]: unable to prove that (exists ((ensure_linked_list_is_allocated_~curr~0.offset (_ BitVec 64)) (ensure_linked_list_is_allocated_~list.offset (_ BitVec 64))) (let ((.cse0 (bvadd (_ bv8 64) ensure_linked_list_is_allocated_~list.offset)) (.cse1 (bvadd ensure_linked_list_is_allocated_~list.offset (_ bv16 64))) (.cse2 (bvadd ensure_linked_list_is_allocated_~list.offset (_ bv24 64)))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base| (store (store (store (store (select |c_old(#memory_$Pointer$.offset)| |c_ensure_linked_list_is_allocated_#in~list.base|) .cse0 (_ bv0 64)) .cse1 (_ bv0 64)) ensure_linked_list_is_allocated_~curr~0.offset .cse1) .cse2 ensure_linked_list_is_allocated_~curr~0.offset))) (= (store |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base| (store (store (store (store (select |c_old(#memory_$Pointer$.base)| |c_ensure_linked_list_is_allocated_#in~list.base|) .cse0 (_ bv0 64)) .cse1 (_ bv0 64)) ensure_linked_list_is_allocated_~curr~0.offset |c_ensure_linked_list_is_allocated_#in~list.base|) .cse2 |c_ensure_linked_list_is_allocated_#in~list.base|)) |c_#memory_$Pointer$.base|)))) is different from true [2021-11-13 01:42:59,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:15,176 WARN L227 SmtUtils]: Spent 15.21s on a formula simplification. DAG size of input: 92 DAG size of output: 35 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:43:15,177 INFO L354 Elim1Store]: treesize reduction 483, result has 12.7 percent of original size [2021-11-13 01:43:15,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 135 [2021-11-13 01:43:15,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 01:43:29,647 WARN L227 SmtUtils]: Spent 14.45s on a formula simplification. DAG size of input: 97 DAG size of output: 38 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 01:43:29,648 INFO L354 Elim1Store]: treesize reduction 483, result has 14.2 percent of original size [2021-11-13 01:43:29,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 129 treesize of output 179